<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body" v-for="(cart, index) in shopCartList" :key="index">
        <ul
          class="cart-list"
          v-for="cartInfo in cart.cartInfoList"
          :key="cartInfo.id"
        >
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cartInfo.isChecked"
              @change="changeCartChecked(cartInfo)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cartInfo.imgUrl" />
            <div class="item-msg">{{ cartInfo.skuName }}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cartInfo.skuPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <a
              href="javascript:void(0)"
              class="mins"
              @click="changeNum(-1, cartInfo)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              minnum="1"
              class="itxt"
              :value="cartInfo.skuNum"
              @change="
                changeNum($event.target.value * 1 - cartInfo.skuNum, cartInfo)
              "
            />
            <a
              href="javascript:void(0)"
              class="plus"
              @click="changeNum(1, cartInfo)"
              >+</a
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cartInfo.skuNum * cartInfo.skuPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <a href="javascript:;" class="sindelet" @click="deleteOneCart(cartInfo.skuId)">删除</a>
            <br />
            <a href="javascript:;">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="isCheckedAll" />
        <span>全选</span>
      </div>
      <div class="option">
        <a href="javascript:;" @click="deleteCheckedCart">删除选中的商品</a>
        <a href="javascript:;">移到我的关注</a>
        <a href="javascript:;">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">
          已选择 <span>{{ selectedCartNum }}</span
          >件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ totalPrice }}</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to="/trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: "ShopCart",
  mounted() {
    this.getShopcartList();
  },
  computed: {
    shopCartList() {
      return this.$store.state.shopcart.shopCartList;
    },
    selectedCartNum() {
      return this.$store.state.shopcart.shopCartList.reduce((prev, cart) => {
        return (prev += cart.cartInfoList.reduce((prev, cart) => {
          return cart.isChecked === 1 ? (prev += cart.skuNum) : prev;
        }, 0));
      }, 0);
    },
    isCheckedAll: {
      get() {
        return (
          this.shopCartList.every((cart) => {
            return cart.cartInfoList.every((cart) => {
              return cart.isChecked === 1;
            });
          }) && this.shopCartList.length > 0
        );
      },
      async set(flag) {
        let isChecked = flag ? 1 : 0;
        let skuIds = [];
        this.shopCartList.forEach((item) => {
          item.cartInfoList.forEach((item2) => {
            if (item2.isChecked !== isChecked) skuIds.push(item2.skuId);
          });
        });
        try {
          await this.$store.dispatch("changeAllChecked", { isChecked, skuIds });
          alert("批量更改选中状态成功");
          this.getShopcartList();
        } catch (e) {
          alert(e.message);
        }
      },
    },
    totalPrice() {
      return this.$store.state.shopcart.shopCartList.reduce((prev, cart) => {
        return (prev += cart.cartInfoList.reduce((prev, cart) => {
          return cart.isChecked === 1
            ? (prev += cart.skuNum * cart.skuPrice)
            : prev;
        }, 0));
      }, 0);
    },
  },
  methods: {
    //获得购物车信息
    getShopcartList() {
      this.$store.dispatch("getShopcartList");
    },
    //定义改变输入框函数
    async changeNum(changeVal, cartInfo) {
      const { skuId, skuNum: originVal } = cartInfo;
      if(!changeVal) {
        changeVal = 0
      }
      if (changeVal + originVal < 1) {
        changeVal = 1 - originVal;
      }
      try {
        await this.$store.dispatch("addTocart", { skuId, skuNum: changeVal });
        this.getShopcartList();
      } catch (e) {
        alert(e.message);
      }
    },
    //定义改变商品选中状态函数
    async changeCartChecked({ skuId, isChecked }) {
      let skuID = skuId;
      try {
        //如果ischecked为0代表之前没选中，所以要改为选中
        await this.$store.dispatch("changeCartChecked", {
          skuID,
          isChecked: isChecked ? 0 : 1,
        });
        alert("修改商品选中状态成功");
        this.getShopcartList();
      } catch (e) {
        alert(e.message);
      }
    },
    async deleteOneCart(skuId) {
      console.log(skuId)
      try {
        await this.$store.dispatch('deleteOneCart',skuId)
        alert('删除单个商品成功')
        this.getShopcartList()
      }catch(e) {
        alert(e.message)
      }
    },
    async deleteCheckedCart() {
      let skuIds = []
      this.shopCartList.forEach(item => {
        item.cartInfoList.forEach(item2 => {
          if(item2.isChecked) skuIds.push(item2.skuId)
        })
      })
      try {
        await this.$store.dispatch('deleteCheckedCart',skuIds)
        alert('删除已选中商品成功')
        this.getShopcartList()
      }catch(e) {
        alert(e.message)
      }
    }
  },
};
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 15%;
        }

        .cart-list-con2 {
          width: 35%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con4 {
          width: 10%;
        }

        .cart-list-con5 {
          width: 17%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>